Direct observation of individual hydrogen atoms at trapping sites in a ferritic steel

Chen, Y. -S., Haley, D., Gerstl, S. S. A., London, A. J., Sweeney, F., Wepf, R. A., Rainforth, W. M., Bagot, P. A. J. and Moody, M. P. (2017) Direct observation of individual hydrogen atoms at trapping sites in a ferritic steel. Science, 355 6330: 1196-1199. doi:10.1126/science.aal2418


Author Chen, Y. -S.
Haley, D.
Gerstl, S. S. A.
London, A. J.
Sweeney, F.
Wepf, R. A.
Rainforth, W. M.
Bagot, P. A. J.
Moody, M. P.
Title Direct observation of individual hydrogen atoms at trapping sites in a ferritic steel
Journal name Science   Check publisher's open access policy
ISSN 0036-8075
1095-9203
Publication date 2017-03-17
Sub-type Article (original research)
DOI 10.1126/science.aal2418
Open Access Status Not yet assessed
Volume 355
Issue 6330
Start page 1196
End page 1199
Total pages 4
Place of publication Washington, DC, United States
Publisher American Association for the Advancement of Science
Collection year 2018
Language eng
Abstract The design of atomic-scale microstructural traps to limit the diffusion of hydrogen is one key strategy in the development of hydrogen-embrittlement–resistant materials. In the case of bearing steels, an effective trapping mechanism may be the incorporation of finely dispersed V-Mo-Nb carbides in a ferrite matrix. First, we charged a ferritic steel with deuterium by means of electrolytic loading to achieve a high hydrogen concentration. We then immobilized it in the microstructure with a cryogenic transfer protocol before atom probe tomography (APT) analysis. Using APT, we show trapping of hydrogen within the core of these carbides with quantitative composition profiles. Furthermore, with this method the experiment can be feasibly replicated in any APT-equipped laboratory by using a simple cold chain.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
Centre for Microscopy and Microanalysis Publications
 
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